Chair-base



0. H., HANSEN.

CHAIR BASE. APPLICATION HLED OCT- 30, 1920.

Patented July 19, 1921.

2 SHEETS-SHEET 2- 'ATT N Y.

PATENT OFFICE.

OSWALCD H. HANSEN, OF PORT WASHINGTON, WISCONSIN.

CHAIR-BASE.

T 0 all whom it may concern:

Be it known that OSWALDH. HANSEN, a citizen. of the United States, residing at Port Washington, in the county of Ozaukee and State of Wisconsin, has invented a certain new and useful Chair-Base, of which the following is a s ecification.

This invention re ates in general to improvements in the art of manufacturing. furniture, and relates more specifically to an improved base structure for chairs of the revolving type.

An object of the invention is to provide a chair base structure which is simple, compact, strong and neat.

Some of .the more specific objects of the invention are as follows To provide a chair base which may be readily manufactured in commercial quantities and atminimum cost.

To provide a chair base structure which may be rapidly and conveniently assembled and dismantled. a

To provide simple and eflicient means for rigidly connecting the legs of a revolving chair and for firmly uniting them with the seat standard. a

To provide a; chair base hub structure which will present a highly finished and pleasing V appearance.

To provide other improvements in the details of chair base structures, which will reduce to a minimum the cost of construction and which will enhance to a maximum the efficiency of operation. a

A clear conception of several embodiments of the invention may be had by referring to the drawings. accompanying and formin a part of this specification, in which like reference characters designate the same or similar parts in the various views.

Figure 1 IS a top view of one type of improved chair base hub. r Fig. 2 is a transverse central vertical sec-. tion through the hub disclosed in Fig. 1, the, section being taken longitudinally through a pair of the chair legs.

Fig. 3 is a transverse horizontal. section through the hub, the section being taken along the line IIL-III of Fig. 2, looking in a downward direction. a

Fig. 4 is acentral vertical section through the hub thesection being taken alon the line IV- IV of Fig.1, looking in a ori-.

zontal direction.

Specification of Letters Patent.

Patented July 19, 1921.

Application filed October 30, 1920. Serial No. 420,595.

along the line VfIL-VIII of Fig. 7,1001;-

ing 111 a downward direction.

*1g. 9 1s a central vertical sectlon through the hub, the section being taken along the line IX-1X of Fig. 6, looking in a hori zontal direction.

Fig. 10 is a part sectional top view of a modified form of hub of the type disclosed in Figs. 6 to 9 inclusive.

Each of the chair bases disclosed in the several figures of the drawings, comprises a central seat supporting standard or rod 5, a plurality of legs 4 extending transversely of the rod and having inner ends located adjacent to the lower rod end, top andbottom plates rigidly secured to the rod 5 and formed for engagement with the legs 4 to prevent displacement thereof away from the rod, and means for preventing relative displacement of the legs 4 longitudinally of the rod 5. The central standard may be formed either as a solid cylindrical rod 5 or as a hollow member, and has the seat revolubly associated with its upper extremity. The legs 4: are ordinarily formed of wood radiating from the rod 5, and are provided with upper and lower transverse recesses forming upper and lower projections at the inner extremities of the legs 4:. It will be apparent that these leg projections may be formed without recessing the legs 4: and that they need not be located at the extreme le ends as disclosed.

eferring specifically to the embodiment of the invention disclosed in Figs. 1 to 4 inclusive, the legs 4.- have their inner ends abutting directly against the central rod 5, and are provided with upper and lower transverse rectilinear recesses 13, 16 respectively, forming upper and lower leg projections extending longitudinally of the rod 5. Lo-. cated between the inner ends of adjacent legs. 4., are filler pieces or blocks 7 preferably formed of wood and of appearance genertion.

wardly extending hub 8 embracing and rigidly secured to the rod 5 by means of a rivet prevented by the transverse pins 21, 22 which penetrate the rod-and extend into holes in the leg ends.

Referring to the embodiment of the invention disclosed in Figs. 6 to 9 inclusive,

the legs 4 have their inner ends located in 12 or the like. The outer periphery of the topplate 2 is provided with an integral continuous ring element. or curved flange 9 extending downwardly and fitting snugly withinthe' upper recesses 13 of all ofthe legs 4. :Thebottomplate 3 has a central downwardly extending hub 15 "embracing an'd rigidly secured to the rod 5 by means of a rivet 12 or the like. The outer periphery ofithe'tbottom plate 3 is provided with an integral continuousring-element or curved flange 14 extending upwardly toward the flange 9 of the top plate2, and fitting snugly within the lower recesses 16 of all ofthe legs 4. Thetop and bottom plates 2,3 are firmly attached tothe upper and lower end leg projections by means of screws '11 or the like," and 'have their flanges 9,16 engageable with the upper and lower ends of the filler blocks 7 to hold them in position. The top and bottom plates 2, 3 are identical in struccure thus making them interchangeable, and are prefeably formed by pressing them from sheet metal. The central rod 5 is penetrated by upper and lowertransverse pins'21, 22 whiehare fitted in recesses in the ends of thelegs 4 thus positively preventing relative displacement'o'f the legs 4 and rod 5 longitudi'nally'of the latter; r

. Themodified form of hub disclosed in Fig. 5'is ofa-type generally similar to'that disclosed in'Figs; 1 to. 4inclusive. In this modified hub, theinnerends of the legs 4 are iorm'ed to snugly embrace the central rod 5, and are provided with upper and lower transverse rectilinear recesses 25,26 respectively of width substantially equal to the/thickness ofthe top'and-bottom plates.

These recesses 25, 26 form upper and lower leg projections extending longitudinally of the rod "5. The filler blocks located between the leg ends are formed to completely fillqtheborners produced by .the adjacent legs 4. The top and bottom plates 20, 30 havecentral' hubs embracing and rigidly secured to'the'rod 5, and have continuous peripheral annular flanges 23, 24 respectivelywhich are flattened adjacent to the legs, 4 and which fit snugly within the recesses25, 26 thereof. 'The top and bottom plates 20, 30 are firmly attached to the upper and I lower leg projections by means of Screws 11 and have flanges 23, 24 engageable with the upper and lower extremities of the filler blocks 7 0 to hold these blocks in posie The plates '20, 30, are identical in structure and are preferably pressed from sheet metal. Displacement of the legs 4 longitudinallyo f the rod 5, is positively close promixity to the central rod 5, but do not abut the same. The legs 4 of this embodiment are provided with upper and lower transverse rectilinear recesses 13, 16 respectively forming upper and lower leg projections extending longitudinally of the'rod 5, and are fitted in sockets formed by theanglc brackets 6 and thetop and bottomplates 2, 3. The filler pieces or blocks 7 are of length equal to the width of the legs 4 across the end projections, and are located between adjacent leg ends. The top and bottom platesr2, 3 have central: hubs, 8, 15en1bracing and rigidly secured to the rod 5 by means of rivets 12,and have continuous annular pe ripheral flanges 9, l4 fitting within the re cesses 13, 160i all of the legs 4 and engageable with the upper and lower ends of the filler blocks 7 to hold these blocks firmly against the legs 4 andagainst the angle brackets 6. The top and bottom plates 2, 3 are attached'to the upper-and lower end projections of the legs 4, by means of screws 11 and are rigidly secured to the ends of the angle brackets 6 by means of distortable cars 10. The top and bottom plates of this embodiment are identical in structure, as are also the several angle brackets 6.

The modified form of hub disclosed in Fig. 10 is of a type generally similar to that disclosed in Figs. 6 to 9 inclusive. In this modified form the legs 4 have their inner ends locatedin close proximity to the central rod 5 and fitted within sockets formed by the channel brackets 18 and the top and bottom plates 2, 3. The legs 4 are pro vided with upper and lower transverse rectilinear recesses which as in the previous embodiments form upper and lower leg projections extending longitudinally of the central rod 5. The top and bottom plates 2, 3 are identical in structure with the top 'and bottom plates of thepreccding embodiment and "are formed to -'engage the transverse recesseslS, 16 of the'legs 4, and the filler blocks 7 in order to prevent displacement of these elements away from the central rod 5. 'The top and bottom plates 2, 3 of this embodiment are firmly secured to the ends of the channel brackets 18 bymeans of distortable cars 19.

It will be noted that in each of the several embodiments of the invention, the chair leg ends are provided with upper and lower projections extending longitudinally of and in'close proximit to the central'scat supporting rod-"5. hese rojections are engaged by an embracing ring element or continuous annular flange which positively pre Jon ll (l vents displacement of the legs 4 away from the rod 5 thus producing an exceedingly strong base structure. These ring elements also hold the filler blocks firmly against the sides of the legs 4, thus positively preventing lateral displacement of the legs. The ring elements or flanges by virtue of their continuity, also provide a structure which cannot be readily distorted, and are driven into the leg recesses during assembling of the hubs. It will be apparent that the hub structures may be readily assembled and dismantled by insertion and removal of the rivets 12, the screws 11 and the ears 10, 19. The firm attachment of the top and bottom plates to the stationary rod 5 also adds rigidity and strength to the structure. By forming the top and bottom lates and the angle and channel brackets o pressed sheet metal, the commercial manufacturing cost of the structure is reduced to a minimum.

It will be understood that it is not desired to limit the invention to the exact details of construction herein shown and described, for obvious modifications within the scope of the a pended claims may occur to persons skil ed in the art.

It is claimed and desired to secure by Letters Patent 1. A chair base comprising an upright seat supporting rod, a pair of spaced lates rigidly attached to said rod, each 0 said plates having a continuous peripheral flange extending toward the other plate, and a plurality of legs having both of said flanges embedded therein.

2. A chair base comprising an upright core, legs radiating from said core, each of said legs havin an upper and a lower shoulder extending longitudinally of said core, a to plate rigidly attached to said core and liaving a downwardly extending flange engagin said u per leg shoulders, and a bottom p ate rigi ly attached to said core and having an upwardly extending flange engaging said lower leg shoulders.

3. A chair base comprising legs radiating from a common center, each of-said legs having an upper and a lower transverse shoulder, a top plate having a continuous peripheral flange extending transversely of said legs and engagin said upper leg shoulders, and a bottom p ate having a continuous peripheral flange extendin transversely of said legs and engaging sai lower leg shoulders.

4. A chair base comprising an upright seat supporting rod, legs having inner ends in proximity to said rod, each of said legs having an upper and a lower shoulder extending longitudinally of said rod, means for preventing relative displacement of said legs and said rod longitudinally of the latter, and upper and lower continuous ring elements extending longitudinally of said rod and engaging said upper and lower leg shoulders respectively to prevent relative displacement of said legs and said rod transversely of the latter.

5. chair base comprising identical top and bottom plates each having a continuous flan e extending toward the other late, and a pluralit of legs having both of said flanges embed ed therein.

6. A chair base comprising a plurality of legs each having transverse upper and lower recesses therein, a top plate having a continuous flange fitting within the upper recesses of all of said legs, and a bottom plate having a continuous flange fitting within the lower recesses of all of said legs.

7 A chair base comprising a core member, a plurality of legs having ends coacting with said member, each of said legs having upper and lower transverse recesses therein, a top late having a continuous flange fitting within the upper recesses of all of said legs, and a bottom late having a continuous flange fitting within the lower recesses of all of said legs, said legs being removable only upon separation of said plates axially of said member.

8. A chair base comprising a plurality of legs each having transverse upper and lower vertically alined recesses therein, and top and bottom plates having flange portions fitting within the upper and lower recesses respectively of all of said legs.

9. A chair base, comprising an upright seat sup orting standard, a pair of vertically spaced s eet metal plates secured to said stand- .ard, each of said plates having a continuous 

